Question

Image text transcribed for accessibility:Drude model of conductivity: For Cu metal we have Atomic density = natomic = 8. 47 times 1028/m3; nearest neighbor distance between atoms = am = 2. 9 A Assume 1 free e'/atom, calculate the average time between collisions, tau at 4K and 300K. Calculate the average thermal velocity, vth, at 4K and 300K. Calculate the average mean free path, lmfp = vth. tau at 4K and 300K. We will see that when the Pauli principle is applied to e in solids that our expression for is too small. We will see that vth withPauli = 10 times vth at 300K and is approximately constant for T [1K, 500K]. With this value, recalculate the results of c).